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Hamaoka's Restart Bid Dies, Takeover Season Heats Up
Chubu Electric's own whistleblowing system missed bad seismic data, so the utility scrapped its Hamaoka restart — while five separate buyout battles and a SoftBank-backed Nasdaq IPO kept Tokyo's dealmakers busy.
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Market pulse
Tokyo equities softened while the 10Y JGB yield nudged higher.
Sourced from Nikkei, JPX, BOJ, MOF - values, not commentary.
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Chubu Electric's Nuclear Reboot Implodes on Bad Data

Chubu Electric Withdraws Hamaoka Restart Bid After Seismic-Data Misconduct
Chubu Electric has withdrawn its applications to change installation permits for Hamaoka Nuclear Power Station Units 3 and 4, killing its bid to restart the reactors for now. The company pulled the filings after finding irregularities in the seismic ground-motion data behind its own restart case — irregularities that its internal whistleblowing system had failed to catch in the first place.
Why it matters: Nuclear power is supposed to supply roughly 20% of Japan's electricity under the government's 2040 energy mix plan, and Hamaoka's restart was part of getting there. A utility whose compliance system can't catch bad seismic data undercuts the credibility case regulators need to keep approving restarts elsewhere.
What to watch: Japan's industry minister said at his post-cabinet briefing that the government will weigh a maximum-strictness regulatory response once Chubu Electric answers a formal information order issued under the Electricity Business Act. The utility has already announced an investigation report and a management change; how far METI pushes from here is still open.
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Boardroom Pressure and Buyouts

Oasis Management Raises M3 Stake to 7.40% and Proposes Delisting
Activist fund Oasis Management now holds 7.40% of M3, Inc., up from 6.26%, after a roughly ¥82.3bn buying spree funded entirely from fund capital, and it says it has already proposed delisting the shares and, separately, a third-party share acquisition that would leave that party holding a majority of voting rights, with dismissal of the representative director and a dividend-policy fight flagged as possible next steps.

Hikari Tsushin Vehicle Bids ¥1,000 a Share to Take Leopalace21 Private
K891, a vehicle controlled by Hikari Tsushin, has filed a ¥1,000-per-share tender offer for Leopalace21 that would hand the bidder group 66.36% of voting rights at minimum, with Hikari Tsushin, MBK Partners and NEC Capital Solutions set to hold roughly a third each of the buyer's parent once fresh capital comes in after the offer closes.
Kadoya Sesame's Buyout Price Hinges on Whether Mitsubishi and Mitsui Sell Out
Integral's buyout vehicle has launched a ¥2,514-a-share tender offer for Kadoya Sesame Mills, Japan's leading sesame-oil maker, but the final payout to shareholders depends on whether Mitsubishi Corporation and Mitsui & Co., which together hold nearly half the stock, agree to exit through a separate share buyback rather than tendering, an arrangement that could lift the price as high as ¥2,760.
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Money Moving In and Out of Japan

SB Energy Opens $500mn Japan Retail Tranche Ahead of Unapproved Nasdaq Listing
A SoftBank-controlled AI data-centre developer is selling shares to Japanese retail investors through five brokers before Nasdaq has approved its listing, while NVIDIA has agreed to buy $1.5bn of unregistered stock in a private placement tied to the same deal.

Capital Research Cuts Metaplanet Stake Below 10%, Filing Shows Big Stock-Loan Book
A Los Angeles adviser's stake in Tokyo-listed Metaplanet fell to 9.76% after a run of September sales, and the same filing discloses tens of millions of its shares out on loan to JPMorgan and Fidelity.
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Compliance Bills Come Due

Supreme Court Rejects Taisei and Kajima Appeals Over Linear Shinkansen Bid-Rigging Case
The Supreme Court's rejection of Taisei Corporation's final appeal fixes a ¥250mn fine and a suspended sentence for a former adviser over antitrust violations tied to Linear Chuo Shinkansen terminal-station construction, and Kajima Corporation says its own appeal in a related case tied to the same railway project has also failed.

Nidec Sets September 30 Record Date for Delayed Accounting Vote
Shareholders on Nidec's register as of September 30 will get a say on the financial statements and audit reports frozen since June by an internal accounting scandal, though the extraordinary meeting's date and agenda are still unset.
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Robotaxis Get a 2027 Launch Date

GO and Waymo Set 2027 Target for Driverless Tokyo Taxis
GO Inc. and Alphabet's Waymo have signed a deal to move from supervised test rides to a driverless taxi service in Tokyo, aiming to launch Japan's first Level 4 commercial robotaxi operation in 2027.
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More to Know
Japan Activation Capital Buys Its Way to a 6.2% Stake in Nihon Kohden
Read moreAn off-market purchase worth ¥14.06bn lifted the Tokyo investment fund's stake in Nihon Kohden to 6.20%, and its filing pairs a "pure investment" label with a pledge to engage management through dialogue rather than public demands.
ASKUL's Ransomware Recovery Drags Into a Second Year, Now With a Quarterly Loss
Read moreASKUL's quarterly sales fell 8.2% and operating profit turned into a ¥418 million loss as the company keeps rebuilding from an October 2025 ransomware attack, yet it has not touched its full-year forecast of ¥7 billion in operating profit, a target that now depends on a sharp turnaround over the next three quarters.
Tokyo Drafts a Bypass So Solar Developers Don't Repeat Environmental Reviews Twice
Read moreJapan's environment ministry is taking comment on a draft rule that would let solar developers carry prefecture or city environmental review paperwork into the national assessment process now that an amended enforcement order brings solar projects under national law, sparing many a full restart, provided the underlying local ordinance meets the ministry's five conditions.
Dainichiseika sets 2027 and 2029 closure dates as it exits offset ink and chitosan
Read moreThe Tokyo-listed colorant and pigment maker will stop offset-ink production in Sapporo by December 2026 and close the site by March 2027, while its Osaka colorant plant runs until September 2028 ahead of a March 2029 closure, as it exits businesses that made up about 5% of last year's group sales to fund a push toward IT, electronics and mobility materials.
J. Front's Duty-Free Sales Swing From Decline to a 37% Surge in Two Weeks
Read moreForeign-visitor spending at Daimaru Matsuzakaya fell in August even as each shopper spent more, then swung to a 37% year-on-year surge in the first two weeks of September, while the Osaka Umeda store keeps dragging on department-store totals and PARCO's shopping centres post an 8.6% gain.
Hakuhodo DY's Growth Number Leans Heavily on Digital Holdings, Not the Ad Business
Read moreDigital Holdings supplied about 5 of the 7.5% sales growth Hakuhodo DY reported for the quarter, leaving organic growth under 3%, while management said AI is already shortening how long North American clients need consulting help.
G-Next raises up to ¥952mn from private investors, diluting holders by more than half
Read moreWith only about ¥100mn in cash against a ¥1bn funding need, the software firm is selling nearly a quarter of itself to five private buyers at a discount, warning its own auditor has doubts about its going-concern status.
TOHO Books ¥10bn Gain From Cross-Shareholding Sale
Read moreTOHO expects to record about ¥10bn from selling part of its policy-held shares this month, part of a plan to cut that holding by more than ¥50bn and push its consolidated net-assets ratio below 10% by 2030, with proceeds earmarked for growth spending and shareholder returns.
Daiseki Subsidiary Wins ¥2.92bn METI Grant for Shizuoka Plastics-Recycling Plant
Read moreDaiseki's environmental subsidiary has secured a ¥2.92bn government subsidy toward a ¥9.95bn plastic-resource recycling plant in Shizuoka, conditioned on lifting per-employee pay on the project by 10.4%, with the resulting special profit not booked until the year to February 2030 and the final subsidy figure still subject to a post-completion review.
Baby Calendar to Buy Orange Page From JR East for ¥507mn, After a ¥2bn Dividend Strips the Cash First
Read moreBaby Calendar has agreed to pay ¥507mn for Orange Page's publisher, but only after JR East pulls out a roughly ¥2bn dividend, a sequencing the buyer says set the price and left a still-loss-making magazine business to absorb.
Advantest's ¥150bn Share Buyback Nears Its Spending Cap With Two-Thirds of Shares Still Unbought
Read moreAdvantest has spent virtually all of the ¥150bn set aside for its share buyback but filled only a third of the 18 million-share ceiling the board authorized, leaving the value cap effectively reached with two months still on the clock before the program's October 2026 expiry.
JPMC Buyout Bidders Raise Price to ¥2,270 but Shrink Deal After Hikari Tsushin Carve-Out
Read moreAmsterdam1 and Amsterdam2 raised their tender offer for Japan Property Management Center to ¥2,270 a share on September 14, but cut the shares they plan to buy and lowered the acceptance minimum after agreeing that Hikari Tsushin group shareholders, holding 9.93% of the company, would sit the tender out entirely, with 8.69% of that stake later sold to JPMC as treasury stock through a related entity.